Do hormone treatments, like testosterone blockers, take away a trans woman’s physical advantage over a female in athletic competition? “Males have natural and categorical advantages over females in ...

REX MD has listed ways too much and too little testosterone can affect physical and mental health, drawing on research from university health research centers, recent medical studies, and a variety of ...

Here’s when and why experts think testosterone should be prescribed to middle-aged women, and how it affects their lives. By Susan Dominus Testosterone use has recently exploded among middle-aged ...

What used to be a niche treatment for men with legitimate medical conditions has morphed into "youth and vigor" as a ...

Genetics play a role in low testosterone for some men, but underlying causes vary widely. Many genes influence testosterone ...

Historically, testosterone has been associated with masculinity. Someone having high levels of testosterone was shorthand for perceived higher levels of aggression, strength, and libido. However, ...